The band Fun. - singer Nate Ruess, guitarist Jack Antonoff and multi-instrumentalist Andrew Dost - is responsible for one of the most popular songs of the year, "We Are Young." The group, which is on the road in support of its album, "Some Nights," plays the Outside Lands Festival next Sunday. Dost tells us what to expect.

Q:Do you feel like you're getting your festival legs?

A: Slowly but surely. It's strange to play outdoors, especially in the daytime. But we're figuring it out. The rules are different for festival shows - how you talk to the crowd, how you can try to get them involved. Things are just a little different, and I think we've learned to adapt our show.

Q: "We Are Young" is everywhere. How do you typically react when you hear it in public?

A: The only time I really hear it is when I'm home in Detroit. I haven't heard it out at a bar or anything, just the radio if I'm driving. And I love it every time. I turn it up and listen to the whole thing.

Q:You guys spent so much time pursuing success. Is it everything you expected?

A: Not really. But I think that's because we had stopped expecting any sort of mainstream success. We were perfectly content to stay on the trajectory we were on - gradually bigger tours, growing our fan base in a pretty grassroots way. This has all been very surprising, and we're grateful that all the years of touring and making albums led to people hearing our music on a bigger scale. {sbox}